1. An investigation into how muscles work together
Power in Pairs
An investigation into how muscles work together

2. Step #1 Seated partner: Standing partner:
Place his/her hands under the edge of the table
Apply gentle upward pressure
Standing partner:
Feel the front and back of the person’s arm (bicep/ triceps)

3. Step #2 Seated partner: Standing partner:
Put hands on top of the table and push downward
Standing partner:
Feel the front and back of your partner’s arm (bicep/ triceps)
2. How did your partner’s bicep and tricep feel when pushing down?

4. Step #3
Switch positions and repeat steps 1 and 2

5. Step #1 (after partners switch)
Seated partner:
Place his/her hands under the edge of the table
Apply gentle upward pressure
Standing partner:
Feel the front and back of the person’s arm (bicep/ triceps)

6. Step #2 (after partners switch)
Seated partner:
Put hands on top of the table and push downward
Standing partner:
Feel the front and back of your partner’s arm (bicep/ triceps)
3. Based on these observations, how do you think the muscles in your arm work?

7. Do we have to tell our muscles to work???
Voluntary:
Choose for it to happen or under your control
Involuntary:
It happens without you choosing or thinking about it

8. 3 Types of Muscle Cardiac muscle: Found only in the heart
Function = pumps blood through the body
Involuntary (works without your control)

9. 3 Types of Muscle Skeletal muscle: Attached to skeleton
Function = moves bones
Voluntary (under your control)

10. 3 Types of Muscle Smooth muscle:
Found in blood vessels and parts of the digestive system
Function = moves food and blood
Involuntary (works without your control)

12. Where are muscles found?
Draw a person (NO STICK PEOPLE).
Label at least 3 parts that are made of skeletal muscle (Label part and type of muscle)
Label at least 3 parts that are made of smooth muscle (Label part and type of muscle)
Draw and label where cardiac muscle is found (Label part and type of muscle)
***There should be at least 7 muscles labeled